295 small tools.
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Fast, focused helpers for data, tokens, encodings, text, web work, time, color, and numbers. Each one runs entirely in this browser tab.
295working utilities
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Format JSON, inspect JWTs, compare text, test regular expressions, and handle small developer jobs without an upload.
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01.env Inspector, Diff & RedactorValidate dotenv syntax, detect duplicates, compare environments, and produce a share-safe redacted template.Open tool 02.gitignore Pattern TesterTest ordered include and exclude patterns against many repository-relative paths with an explanation of the final matching rule.Open tool 033D Model InspectorInspect mesh counts, bounds, geometry, and preservation warnings.Open tool 04Advanced Color, Palette & Vision WorkspaceConvert CSS Color 4 values through OKLab, OKLCH, Lab, LCH, RGB, HSL, HWB and CMYK-style output, then build perceptual palettes and accessibility previews.Open tool 05AES-256-GCM Encrypt & DecryptEncrypt text with a random WebCrypto key or authenticate and decrypt this tool’s JSON package.Open tool 06Android & iOS Localization MigratorMove string resources between Android strings.xml and Apple .strings safely.Open tool 07Animation Frame ExtractorExtract every GIF frame as individually downloadable PNG files.Open tool 08API Collection Migration StudioMove requests among Postman, Insomnia, HAR, OpenAPI, cURL, and canonical collection JSON.Open tool 09Archive Comparison StudioCompare ZIP or TAR virtual file trees by safe path, type, size, and ZIP CRC without extracting user content to disk.Open tool 10Archive Explorer & RepackerInspect a sanitized ZIP tree and selectively download or repack local entries.Open tool 11Argon2id & scrypt Password KDFDerive interoperable password hashes with bounded Argon2id or scrypt parameters in a dedicated local worker.Open tool 12Arrow & Feather WorkbenchConvert Arrow IPC streams and Feather files through one typed tabular model.Open tool 13ASCII Art Banner GeneratorDraw short headings with a deterministic block font for terminals, READMEs, and source comments.Open tool 14ASN.1 DER Tree InspectorParse strict DER tags, lengths, OIDs, strings, nesting, and offsets from PEM, Base64, or hexadecimal data.Open tool 15Aspect Ratio & Dimensions CalculatorReduce an image or video ratio and calculate missing dimensions for responsive layouts.Open tool 16Audio & Video Probe StudioInspect common media container headers, chunks, duration metadata, audio parameters, and brands before running a conversion.Open tool 17Audio Transcription & Subtitle GeneratorRun a pinned local speech model and preserve timestamped segments.Open tool 18Audio Trim & Loudness NormalizerTrim audio and apply explicit EBU R128-style normalization in the local media engine.Open tool 19Barcode DecoderDecode supported local QR and barcode images without camera persistence.Open tool 20Base32, Base58 & Ascii85 CodecEncode UTF-8 text or decode three common non-Base64 alphabets.Open tool 21Base45, Base91 & Z85 CodecEncode UTF-8 text into Base45, Base91, or ZeroMQ Z85 and decode valid text payloads locally.Open tool 22Base64 Encoder & DecoderEncode UTF-8 text as Base64 or decode Base64 back to text.Open tool 23Batch Timestamp ConverterConvert thousands of Unix seconds, milliseconds, ISO dates, and human-readable timestamps in one local table.Open tool 24bcrypt Hash & VerifyCreate or verify interoperable bcrypt password hashes through a lazy local WASM engine.Open tool 25Benchmark Result ComparatorCompare already-measured benchmark cases without executing pasted code or scripts.Open tool 26Bibliography Format WorkbenchConvert BibTeX, RIS, and CSL JSON through normalized citation records.Open tool 27Binary Hex & File Signature InspectorInspect magic bytes, MIME hints, printable strings, entropy, and a bounded hexadecimal preview.Open tool 28Binary Serialization InspectorDetect and decode MessagePack, CBOR, or BSON into a bounded, navigable structure without executing decoded values.Open tool 29BIP-39 Mnemonic Generator & ValidatorGenerate cryptographically random English BIP-39 mnemonics or validate their word list and checksum locally.Open tool 30Browser & Device InformationInspect the capabilities this page can observe without network lookups, fingerprinting scripts, or persistent identifiers.Open tool 31Business Days CalculatorCount inclusive weekdays while excluding user-supplied holiday dates.Open tool 32Byte Endianness SwapperReverse byte order within 16-, 32-, or 64-bit hexadecimal words.Open tool 33Cache-Control AnalyzerParse response caching directives and explain storage and revalidation behavior.Open tool 34CAD Drawing Exchange InspectorValidate supported ASCII DXF drawing primitives and inspect them as typed, bounded CAD JSON.Open tool 35Calendar Event QR GeneratorCreate an iCalendar event QR code with explicit UTC start and end times.Open tool 36Camera RAW Privacy InspectorInspect EXIF, GPS, camera, lens, author, and capture-time metadata in popular camera RAW files without developing their pixels.Open tool 37Cargo Version Requirement ExplainerExplain Cargo-compatible SemVer requirements and test a Rust crate version.Open tool 38Case ConverterConvert words to common prose, identifier, and path naming styles.Open tool 39CBR to CBZ MigratorRead a CBR archive locally and repack its sanitized pages as interoperable CBZ without creating RAR output.Open tool 40chmod Permission CalculatorConvert Unix permissions between octal and rwx notation.Open tool 41CIDR Set CalculatorSummarize, union, intersect, or subtract large IPv4 CIDR lists and return the exact minimal set.Open tool 42Citation Quality & Duplicate AuditorInspect CSL JSON citations for missing identity fields, invalid DOI shapes, and probable duplicates.Open tool 43Code & Markup FormatterFormat, validate, or minify popular code and markup with browser-only, language-aware parsers.Open tool 44Color Converter & Contrast CheckerConvert HEX, RGB, or HSL colors and check WCAG contrast between two opaque colors.Open tool 45Color Difference ΔE CalculatorCompare two HEX colors in Lab space using transparent ΔE76 math.Open tool 46Comic Book Archive OrganizerOpen CBZ pages through a sanitized file tree, inspect reading order, and download individual images or a safe ZIP.Open tool 47Contact Sheet BuilderArrange multiple PNG images into a labeled review grid.Open tool 48Contact vCard QR GeneratorCreate a standards-based contact QR code with name, email, phone, and organization.Open tool 49Content Security Policy BuilderBuild a conservative CSP header from explicit source lists and explain major protections before deployment.Open tool 50Cookie & Set-Cookie AnalyzerParse one cookie value and flag missing Secure, HttpOnly, and SameSite attributes.Open tool 51Coordinate & Map Data ConverterTurn coordinate rows into inspectable GeoJSON features.Open tool 52CRC32 ChecksumCalculate a standard CRC-32 checksum for UTF-8 text.Open tool 53Cron Dialect TranslatorTranslate field layouts between Unix, Quartz, Spring, AWS EventBridge, and GitHub Actions with explicit lossy-case warnings.Open tool 54Cron Expression ExplainerValidate a five-field cron expression and calculate upcoming UTC run times.Open tool 55CSP & CORS Header AnalyzerAnalyze Content-Security-Policy and CORS response headers for common security and interoperability problems.Open tool 56CSS clamp() & Fluid Type CalculatorCalculate a linear CSS clamp() expression between two sizes and viewport widths.Open tool 57CSS Gradient & Palette BuilderCreate a linear-gradient declaration and inspect evenly spaced sRGB swatches.Open tool 58CSS Specificity CalculatorCalculate common selector ID, class, attribute, pseudo-class, element, and pseudo-element weights.Open tool 59CSV & Table ExplorerInspect CSV or TSV as a typed, sortable data table with column-quality profiling.Open tool 60CSV Delimiter & Header DetectorDetect comma, tab, semicolon, or pipe tables and report structural confidence.Open tool 61cURL to Fetch ConverterConvert a focused cURL request into readable browser fetch code.Open tool 62Data URI Builder & ParserBuild a text data URI or safely inspect one without rendering its content.Open tool 63Dataset Row Diff StudioCompare JSON-array or CSV datasets by a stable key and separate added, removed, changed, and unchanged rows.Open tool 64Dataset to SQLite BuilderCreate a real SQLite database from CSV with inferred column affinities.Open tool 65Date & Time Difference CalculatorCalculate the exact elapsed duration between two ISO dates or absolute date-times.Open tool 66Date Format Translator & PreviewPreview a UTC date pattern and show focused strftime, Java, and .NET equivalents.Open tool 67Descriptive Statistics CalculatorCalculate count, range, mean, median, quartiles, population variance, and standard deviation.Open tool 68Docker Compose Validator & NormalizerParse Compose YAML, summarize services, flag missing build/image fields and risky privileged mode, and emit deterministic YAML.Open tool 69Docker Run → Compose ConverterParse a bounded docker run command into an inspectable Compose model without invoking a shell.Open tool 70Document Media ExtractorExtract embedded DOCX images and media through a sanitized package tree.Open tool 71Duration ConverterConvert ISO 8601 durations, seconds, or readable time spans into normalized forms.Open tool 72E-book Text & Outline ExtractorExtract readable Markdown from a DRM-free EPUB package.Open tool 73Email Header & MIME InspectorParse an RFC-style email, summarize routing/authentication headers, and inventory MIME parts without rendering content.Open tool 74Email List NormalizerValidate, normalize, deduplicate, and sort a pasted email list without contacting mail servers.Open tool 75Email QR Code GeneratorCreate a mailto QR code with an optional subject and message body.Open tool 76Emoji Picker & InspectorSearch a curated, keyboard-friendly emoji palette and inspect the selected Unicode sequence.Open tool 77ETA & Throughput CalculatorEstimate completion time from completed work, total work, and elapsed duration.Open tool 78FASTA, FASTQ & Sequence WorkspaceValidate biological sequence records, preserve quality scores, and convert through typed JSON.Open tool 79Favicon Package GeneratorCreate common PNG icon sizes and ICO output in one local package.Open tool 80File → Base64 EncoderEncode any local file as Base64 or a complete data URI without uploading its bytes.Open tool 81FITS Header & Dimension InspectorInspect bounded FITS primary-header cards, dimensions, and pixel metadata locally.Open tool 82Font Glyph Coverage InspectorInspect names, metrics, Unicode coverage, and embedding guidance.Open tool 83Font Subsetter & Webfont BuilderSubset a local font and produce a web-ready WOFF2 artifact.Open tool 84Fraction, Percent & Scientific ConverterNormalize decimal, fraction, percentage, and scientific notation with exact rational arithmetic.Open tool 85G-code Toolpath Safety InspectorNormalize bounded G0–G3 motions without executing, simulating, or controlling a machine.Open tool 86Gettext PO & JSON WorkbenchInspect gettext message context, source, target, and translator notes as canonical JSON.Open tool 87Git Command ReferenceSearch a curated Git reference by goal and copy safe, non-destructive command patterns.Open tool 88Glob to RegexTranslate a common file glob into an anchored JavaScript regular expression.Open tool 89GPS Track & Map ConverterConvert GPX waypoints and tracks into inspectable GeoJSON.Open tool 90Grapheme, Terminal Width & Invisible Character AnalyzerSegment user-perceived characters and expose code points, UTF sizes, terminal columns, bidi controls, and invisible clusters.Open tool 91GraphQL Formatter & Operation ExplorerFormat GraphQL documents, list operations and fragments, and check balanced syntax without executing a query.Open tool 92GraphQL Schema Compatibility DiffCompare GraphQL SDL for removed types and fields, changed field types, newly required arguments, and compatible additions.Open tool 93HAR to API Collection BuilderExtract inert request methods, URLs, headers, and bodies from a HAR without replaying traffic.Open tool 94HAR Waterfall & Privacy InspectorInspect an HTTP Archive as a request waterfall and flag cookies, authorization, query secrets, and oversized assets.Open tool 95Hash GeneratorCalculate standard cryptographic digests for text using WebCrypto.Open tool 96Hash Identifier & Multi-Checksum VerifierCalculate CRC-32, MD5, SHA-1, SHA-256, SHA-384, and SHA-512 for one file and verify a pasted checksum manifest.Open tool 97Hexdump Builder & ParserCreate canonical offset, hexadecimal, and ASCII views or parse common hexdump lines back into UTF-8 or raw hex.Open tool 98HMAC GeneratorAuthenticate text with a shared secret and SHA-2 HMAC.Open tool 99HTTP Basic Auth Builder & DecoderBuild or decode an HTTP Basic Authorization value locally.Open tool 100HTTP Header ParserParse an HTTP header block into a normalized local report and flag credential-bearing fields.Open tool 101HTTP Request Code GeneratorTurn cURL or a neutral request model into safe, editable request snippets for ten popular targets.Open tool 102HTTP Status Code LookupExplain common HTTP response codes, body expectations, and status class.Open tool 103IBAN Validator & ParserNormalize an IBAN, validate its country length and ISO 13616 checksum, and expose common BBAN fields locally.Open tool 104IEEE-754 Float VisualizerInspect sign, exponent, fraction, hexadecimal bytes, and decimal value.Open tool 105Image Asset SplitterSplit one image or logo sheet into separately named assets with an equal grid or draggable custom cut lines.Open tool 106Image CompressorRe-encode and compare an image with visible quality and dimension controls.Open tool 107Image Metadata Privacy ViewerInspect EXIF and privacy-sensitive location, device, author, and time fields.Open tool 108Image OCR WorkbenchRecognize image text locally with explicit language-pack downloads.Open tool 109Image Palette ExtractorExtract dominant CSS-ready colors and transparency coverage.Open tool 110Image Resize, Rotate & Flip StudioResize and transform raster pixels with a live, format-aware result.Open tool 111International Phone Parser & FormatterParse, validate, classify, and format international phone numbers with pinned numbering metadata.Open tool 112IPv4 Address Representation ConverterConvert one IPv4 address between dotted decimal, unsigned integer, hexadecimal, octal, and binary.Open tool 113IPv4 CIDR & Subnet CalculatorInspect an IPv4 address and CIDR prefix without any network requests.Open tool 114IPv4 Range Expander & SummarizerSummarize an inclusive IPv4 range or expand a safely bounded range.Open tool 115IPv6 CIDR CalculatorNormalize IPv6 addresses and calculate network ranges, host counts, reverse DNS, and IPv4-mapped details.Open tool 116IPv6 ULA Prefix GeneratorGenerate a random RFC 4193-style locally assigned /48 prefix with subnet examples.Open tool 117JPEG XL Conversion StudioDecode, resize, and encode JPEG XL images locally through a lazy browser codec.Open tool 118JSON Deep MergeMerge two JSON documents recursively with an explicit array policy.Open tool 119JSON DiffCompare two JSON values by path instead of noisy text formatting.Open tool 120JSON FlattenTurn nested objects and arrays into a flat path-to-value map.Open tool 121JSON MinifierValidate JSON and remove insignificant whitespace.Open tool 122JSON Patch & Merge Patch WorkbenchCreate or apply RFC 6902 JSON Patch and RFC 7396 JSON Merge Patch documents with path-level validation.Open tool 123JSON Pointer ExplorerResolve an RFC 6901 JSON Pointer and inspect the selected value without running expressions.Open tool 124JSON Pretty PrintFormat JSON with readable indentation and an optional stable key order.Open tool 125JSON Repair with Patch PreviewRepair comments, a byte-order mark, and trailing commas without guessing missing business data.Open tool 126JSON Schema Compatibility DiffCompare JSON Schemas for type changes, newly required or removed properties, narrowed enums, and tightened numeric ranges.Open tool 127JSON Schema Example GeneratorCreate a deterministic example value from local JSON Schema keywords.Open tool 128JSON Schema GeneratorInfer a draft-aware JSON Schema from a representative JSON value.Open tool 129JSON Schema ValidatorValidate JSON against draft-07, 2019-09, or 2020-12 JSON Schema with complete local-reference diagnostics.Open tool 130JSON Sort KeysRecursively sort object keys while preserving array order.Open tool 131JSON UnflattenRebuild nested objects and arrays from path-based JSON keys.Open tool 132JSON ValidatorCheck JSON syntax and summarize the root value.Open tool 133JSONPath & JMESPath Query WorkbenchQuery JSON using JMESPath or a non-evaluating JSONPath implementation with explicit supported syntax.Open tool 134JWKS Key Set InspectorValidate a JSON Web Key Set, calculate RFC 7638-style public-material thumbprints, and flag private keys or duplicate IDs.Open tool 135JWT Decoder & InspectorDecode JWT header and payload claims without treating the token as trusted.Open tool 136JWT HS256 SignerCreate an HS256 JWT from a JSON payload and a local secret.Open tool 137JWT HS256 VerifierVerify an HS256 signature and inspect the decoded claims locally.Open tool 138JWT RSA & ECDSA VerifierVerify RS256/384/512 or ES256/384 JWT signatures with a local JWK or PEM public key and inspect claim policy.Open tool 139Keyboard Event InspectorCapture key, code, location, modifier, repeat, and composition properties inside an explicit focus target.Open tool 140Kubernetes & GitHub Actions Manifest LinterRun pinned offline structural checks for Kubernetes resources or GitHub Actions workflows and surface precise paths.Open tool 141Line Sorter & DeduplicatorClean, sort, and remove duplicate lines in one pass.Open tool 142List Set OperationsCalculate union, intersection, difference, or symmetric difference between two line lists.Open tool 143Local Secret ScannerFind common credential shapes while redacting every matched value from the report.Open tool 144Localization Completeness AuditorCompare source and translated JSON messages for missing, extra, empty, unchanged, and placeholder-mismatched entries.Open tool 145Localization Format WorkbenchConvert XLIFF, gettext, TMX, Android, Apple, RESX, ARB, and Fluent through typed messages.Open tool 146Luhn Checksum ValidatorNormalize and validate identifiers that use the Luhn mod-10 checksum.Open tool 147LZ4 Compression WorkbenchCreate browser-compatible LZ4 frames with fast local compression.Open tool 148MAC Address Formatter & InspectorValidate and normalize EUI-48 or EUI-64 addresses and inspect their administration and transmission bits.Open tool 149MAC Address Generator & Vendor HintsGenerate unicast MAC addresses or inspect a prefix against a bounded, dated local vendor-hint table.Open tool 150Map Location QR GeneratorCreate a geo QR payload from validated latitude and longitude coordinates.Open tool 151Markdown Table BuilderTurn delimited rows into an escaped, portable Markdown table.Open tool 152Math Typesetter & ConverterTypeset LaTeX, common AsciiMath, or MathML into accessible, inspectable MathML.Open tool 153Maven Version Range ExplainerExplain Maven interval unions and test a comparable artifact version.Open tool 154Mermaid & Graphviz RendererRender Mermaid or Graphviz DOT diagrams into a sanitized SVG preview entirely in the browser.Open tool 155Meta Tag & Social Card BuilderBuild escaped SEO, Open Graph, X/Twitter, canonical, and robots tags from a structured page brief.Open tool 156MHTML Web Archive InspectorInspect multipart MHTML resources, content locations, encodings, media types, and active-markup signals without rendering them.Open tool 157MIME Type LookupLook up common MIME types by filename, extension, or media type.Open tool 158Molecule & Atomic Coordinate WorkspaceInspect and convert PDB, XYZ, and typed atom coordinates without executing embedded content.Open tool 159Morse, ROT13, ROT47 & Caesar CodecEncode or decode common classical representations for puzzles, interoperability, and learning—not security.Open tool 160Multi-Zone Meeting PlannerInterpret an absolute or local meeting time with explicit DST ambiguity handling and compare working-hour impact across IANA zones.Open tool 161Nano ID GeneratorGenerate compact, URL-safe random identifiers with browser cryptography.Open tool 162NATO Phonetic Alphabet ConverterSpell text with the ICAO/NATO alphabet or restore unambiguous code-word sequences.Open tool 163NDJSON Validator & NormalizerValidate newline-delimited JSON record by record and normalize each value onto one line.Open tool 164NIfTI Neuroimaging Header InspectorInspect NIfTI storage, dimensions, voxel sizes, datatype, and description locally.Open tool 165npm Version Range ExplainerParse npm/node-semver ranges, normalize their comparator sets, and test a concrete version locally.Open tool 166NuGet Version Range ExplainerExplain NuGet interval and floating version notation and test a package version.Open tool 167Number Base ConverterConvert arbitrary-size signed integers between bases 2 and 62 without precision loss.Open tool 168Numeronym GeneratorAbbreviate long words as first-letter + omitted-character count + last-letter.Open tool 169OAuth PKCE GeneratorGenerate or validate a verifier and derive its RFC 7636 S256 challenge.Open tool 170Offline DNS Record AnalyzerParse BIND-style A, AAAA, CNAME, MX, TXT, SPF, DMARC, DKIM, CAA, NS, SOA, SRV, and PTR records without DNS queries.Open tool 171OpenAPI Breaking-Change StudioCompare OpenAPI JSON or YAML and surface removed endpoints, operations, responses, schemas, and newly required parameters.Open tool 172OpenAPI Request Example BuilderTurn API operations into an inspectable local request collection with placeholder parameters.Open tool 173OpenAPI Validator & NormalizerValidate an OpenAPI JSON or YAML document and normalize its key ordering and output syntax.Open tool 174OpenDocument Text WorkbenchCreate or extract ODT headings, paragraphs, and lists without a server.Open tool 175OpenPGP Decryption WorkbenchDecrypt an armored OpenPGP message with an in-memory private key or password.Open tool 176OpenPGP Encryption WorkbenchEncrypt text locally with a recipient public key or symmetric password.Open tool 177OpenPGP Key InspectorInspect public-key fingerprints, user IDs, algorithms, dates, and subkeys without establishing trust.Open tool 178OpenPGP Sign & Verify WorkbenchCreate a cleartext OpenPGP signature with a private key or verify one against a public key entirely in memory.Open tool 179Outlook Safe Links DecoderExtract the original destination from Microsoft Safe Links and common nested redirect wrappers without opening it.Open tool 180Parquet & CSV WorkbenchMove tabular data between CSV and compressed Apache Parquet without an upload.Open tool 181Parquet Dataset InspectorDecode Apache Parquet locally through Arrow and inspect safe structured rows.Open tool 182Password & Passphrase Strength EstimatorEstimate offline guessing resistance, identify repeated/common patterns, and give local improvement guidance.Open tool 183PBKDF2 Key DerivationDerive bounded SHA-2 key material with WebCrypto and explicit parameters.Open tool 184PCAP & PCAPNG Flow InspectorInspect packet timestamps, lengths, link type, IP endpoints, and transport protocols without replaying network traffic.Open tool 185PDF Accessibility Structure AuditInspect page geometry, form fields, and tagged-structure signals before a manual PDF accessibility review.Open tool 186PDF Attachment EmbedderEmbed bounded Base64 files into a PDF with safe filename validation.Open tool 187PDF Crop & Page-Box StudioApply precise crop boxes to selected pages with a non-destructive visibility warning.Open tool 188PDF Form & Metadata EditorFill supported fields and edit document metadata locally.Open tool 189PDF Form FlattenerBake AcroForm field appearances into the document so fields are no longer editable.Open tool 190PDF Merge & SplitCombine local PDFs or extract selected page ranges without uploading them.Open tool 191PDF Page Number StudioAdd customizable page numbers without uploading the document.Open tool 192PDF Page OrganizerMerge, split, reorder, rotate, extract, and edit PDF pages and metadata.Open tool 193PDF Page ResizerResize every PDF page canvas using contain, cover, or stretch fitting.Open tool 194PDF Permanent Redaction StudioPermanently remove rectangular page regions through local raster redaction.Open tool 195PDF Privacy & Security InspectorInventory PDF metadata, forms, annotations, attachments, actions, JavaScript signals, signatures, and page geometry without opening active content.Open tool 196PDF Raster Compression StudioCreate a smaller raster-based PDF with an explicit quality warning.Open tool 197PDF Signature Inventory & ByteRange CheckerInspect a local PDF for signature dictionaries and structurally validate their signed byte ranges.Open tool 198PDF Text & OCR ExtractorRecognize page text locally with bounded OCR packs and structured results.Open tool 199PDF Visual & Structural ComparisonCompare two PDFs page by page using isolated drawing-program fingerprints, geometry, page counts, and document metadata.Open tool 200PDF Watermark StudioAdd a local text watermark to selected PDF pages with explicit opacity controls.Open tool 201PEM, JWK & X.509 InspectorInspect certificates and public/private key containers locally without persisting key material.Open tool 202Percentage CalculatorCalculate percentage-of, relative percentage, or percentage change with explicit formulas.Open tool 203Phone Call QR Code GeneratorCreate a tel QR action for a validated phone number.Open tool 204Placeholder Text GeneratorGenerate bounded words, sentences, or paragraphs for layout and typography testing.Open tool 205Portable Filename NormalizerCreate a collision-safe cross-platform rename plan for pasted filenames without touching the filesystem.Open tool 206Privacy Camera RecorderPreview and record a camera stream only after explicit permission, then download the in-memory recording.Open tool 207Protobuf Wire-Format InspectorDecode field numbers, wire types, varints, fixed values, and bounded length-delimited previews without requiring a schema.Open tool 208Publishing Markup WorkbenchConvert AsciiDoc, reStructuredText, Org, LaTeX, Typst, DocBook, JATS, OPML, and Markdown through semantic blocks.Open tool 209Punycode & IDNA Hostname ConverterConvert internationalized hostnames to ASCII or decode xn-- labels locally.Open tool 210Python Version Specifier ExplainerExplain PEP 440 comparison, compatible-release, exclusion, wildcard, and arbitrary-equality specifiers.Open tool 211QR Payload BuilderCreate a scalable QR symbol from local text with explicit error correction.Open tool 212Query String Parser & BuilderParse duplicate query parameters into JSON or build a query string from a JSON object.Open tool 213Quoted-Printable Encoder & DecoderEncode UTF-8 text for MIME or decode quoted-printable bytes as UTF-8.Open tool 214Random Port GeneratorGenerate unbiased-looking bounded port suggestions with browser cryptography.Open tool 215Regex Find & ReplacePreview a JavaScript regular-expression replacement with match counts and strict size limits.Open tool 216Regex TesterTest a JavaScript regular expression and inspect matches and capture groups.Open tool 217Regular Expression Structure ExplainerExplain common anchors, groups, classes, escapes, and quantifiers without running the expression.Open tool 218Responsive Image Set GeneratorGenerate width variants and an editable picture/srcset snippet.Open tool 219robots.txt AnalyzerParse crawler groups, Allow/Disallow precedence, sitemap lines, and test a path without contacting a website.Open tool 220Roman Numeral ConverterConvert canonical Roman numerals and integers from 1 through 3999.Open tool 221RRULE Recurrence Builder & PreviewBuild a focused RFC-style recurrence rule and preview bounded UTC occurrences.Open tool 222RSA Key Pair GeneratorGenerate an RSA signing or encryption key pair with WebCrypto and export standard PEM plus JWK forms.Open tool 223Safe HTML CSS Selector TesterRun a CSS selector against an inert HTML document and inspect matching tag, text, class, ID, and sanitized attributes.Open tool 224Safe Markdown PreviewPreview Markdown as inert semantic UI and export sanitized HTML without executing embedded markup.Open tool 225Safe Math Expression EvaluatorEvaluate arithmetic and common mathematical functions with a purpose-built parser—never JavaScript eval.Open tool 226Safe Rich Text & HTML ComposerCompose headings, emphasis, lists, links, and paragraphs while exporting a strict safe-HTML subset.Open tool 227SAML Response & Assertion DecoderDecode POST or Redirect-binding SAML XML and summarize issuers, subjects, conditions, audiences, status, signatures, and attributes.Open tool 228SBOM Component InventoryInspect a CycloneDX document as a canonical component and dependency inventory.Open tool 229SBOM Conversion StudioConvert CycloneDX and SPDX JSON, YAML, XML, and tag/value through normalized components.Open tool 230SBOM Quality & VEX AuditorAudit CycloneDX or SPDX JSON for component identity, versions, licenses, hashes, package URLs, duplicates, and VEX assessment state.Open tool 231Secure Password GeneratorGenerate strong passwords with browser cryptography, explicit character groups, and an entropy estimate.Open tool 232Secure Token GeneratorGenerate cryptographically random tokens with explicit alphabets, byte lengths, and entropy estimates.Open tool 233Semantic Version ComparatorValidate and compare two Semantic Versioning 2.0.0 versions without package-registry access.Open tool 234Side-by-Side Image Quality ComparatorCompare two equally sized PNG images with exact error metrics and an amplified difference image.Open tool 235Sitemap XML ValidatorValidate sitemap URL sets and indexes, summarize dates and hosts, and flag duplicates or protocol-limit problems.Open tool 236Slug GeneratorCreate clean URL slugs with predictable separators and Unicode handling.Open tool 237SMS QR Code GeneratorCreate a QR action that opens a pre-addressed SMS with an optional message.Open tool 238Snappy Compression WorkbenchCreate and inspect Snappy-compressed text without an upload.Open tool 239Sparse Matrix Exchange WorkspaceValidate Matrix Market coordinate data and convert it to typed, inspectable JSON.Open tool 240SPDX, Package URL & CPE StudioParse and normalize software license expressions, Package URLs, and CPE 2.3 identifiers without registry lookups.Open tool 241Sprite Sheet & CSS BuilderPack ordered PNG assets into one transparent sprite sheet with safe CSS classes.Open tool 242SQL FormatterFormat common SQL clauses and indentation without executing the statement.Open tool 243SQLite Database StudioInspect SQLite or SQLCipher schema and rows, edit cells visually or run bounded SQL, undo changes, and download a new local database.Open tool 244SQLite to Spreadsheet StudioExport a selected SQLite table as a portable XLSX workbook entirely in memory.Open tool 245SSH Key, CSR & Certificate Chain StudioInspect SSH public-key wire fields, X.509 certificate metadata, JWK parameters, and ASN.1 structure for CSRs and key containers.Open tool 246SSH known_hosts InspectorParse OpenSSH known_hosts entries and calculate SHA-256 host-key fingerprints without contacting any host.Open tool 247Stopwatch & CountdownMeasure elapsed time, laps, or a bounded countdown without background services or saved history.Open tool 248Streaming File HashHash large local files incrementally with SHA-256, SHA-512, SHA-1, or MD5 without loading the whole file into memory.Open tool 249String Obfuscation LabTransform text into reversible escape-based representations with prominent non-security warnings.Open tool 250Structured Log & JSONL ExplorerParse JSON Lines and common text logs into searchable event rows with severity and time summaries.Open tool 251Subresource Integrity Generator & VerifierGenerate SHA-256/384/512 integrity metadata for text assets or verify an expected SRI token.Open tool 252Subtitle Quality AuditorAudit SRT or WebVTT cues for overlap, reading speed, long lines, excessive line count, and invalid durations.Open tool 253Subtitle Timing & Format WorkspaceNormalize subtitle cues and convert them through a typed timeline model.Open tool 254SVG Path InspectorInspect path command counts, relative commands, closures, coordinate envelopes, and a safe isolated preview.Open tool 255SVG Placeholder GeneratorGenerate a compact, escaped SVG placeholder with dimensions, colors, label, and optional data URI.Open tool 256TAR.Zstandard Archive BuilderPackage folders into TAR.ZST with safe paths and a pinned Zstandard engine.Open tool 257Text Cleanup WorkbenchNormalize line endings, whitespace, indentation, duplicates, order, wrapping, and direction as you type.Open tool 258Text DiffCompare original and changed text line by line in a side-by-side workspace.Open tool 259Text Escape & UnescapeEscape or unescape JSON string content, HTML entities, and regular-expression literals.Open tool 260Text StatisticsCount words, lines, characters, sentences, and UTF-8 bytes.Open tool 261Time Zone ConverterRender one absolute instant in common IANA time zones using the browser time-zone database.Open tool 262TOTP & HOTP GeneratorGenerate or verify RFC 4226/6238 one-time passwords from a Base32 secret entirely in memory.Open tool 263Transliteration WorkbenchConvert accented and non-Latin writing into a readable Latin approximation without pretending it is translation.Open tool 264ULID GeneratorGenerate sortable 26-character ULIDs or inspect their embedded timestamp.Open tool 265Unicode & Emoji ConverterInspect complete Unicode scalar values and move safely between emoji, U+ notation, HTML references, and JavaScript escapes.Open tool 266Unicode Character InspectorInspect characters as Unicode code points, UTF-8 bytes, and UTF-16 code units.Open tool 267Unicode Normalizer & Invisible Character DetectorNormalize Unicode and flag invisible or bidirectional formatting controls.Open tool 268Unified Git Diff & Patch StudioRead a unified patch as changed files, hunks, additions, deletions, and an accessible split or unified diff.Open tool 269Unit ConverterConvert common engineering, everyday, typography, cooking, fuel-economy, storage, and data-rate units.Open tool 270Universal Barcode GeneratorGenerate safe local SVG for QR, Data Matrix, Code 128, EAN-13, UPC-A, ITF, Codabar, Code 39, PDF417, and Aztec.Open tool 271Unix Timestamp ConverterConvert Unix seconds, Unix milliseconds, or a date string into common time forms.Open tool 272URL & IP Defanger / RefangerNeutralize common URL, domain, email, and IP indicators or restore their conventional form.Open tool 273URL Encoder & DecoderEncode or decode URL components and complete URI strings.Open tool 274URL Parser & Query InspectorBreak an absolute URL into components and preserve repeated query parameters.Open tool 275URL, Email, IP, Hash & Date ExtractorExtract unique, syntactically plausible values from pasted text.Open tool 276User-Agent ParserSummarize common browser, operating-system, mobile, and bot signals.Open tool 277UTM URL Builder & CleanerAdd canonical campaign parameters to a URL or remove common tracking parameters while preserving other query values.Open tool 278UUID Generator & ValidatorGenerate random UUID v4 identifiers or inspect an existing UUID.Open tool 279UUID v7 Generator & InspectorGenerate time-ordered RFC 9562 UUID v7 identifiers or inspect their embedded Unix-millisecond timestamp.Open tool 280Variable Font Axis & Instance InspectorRead OpenType fvar and name tables to show exact design axes, bounds, defaults, hidden flags, and named instances.Open tool 281Video Audio ExtractorExtract an MP3 audio track from local video with bitrate controls.Open tool 282Video CompressorResize, crop, trim, mute, and transcode video with preflight resource estimates.Open tool 283Video to GIF StudioTrim, resize, and choose frame rate before producing an animated GIF.Open tool 284Visual Cron BuilderBuild a standard five-field cron expression from explicit schedule controls and preview upcoming UTC runs.Open tool 285WARC Web Archive InspectorInventory WARC records, targets, dates, types, payload sizes, and content types without rendering captured pages.Open tool 286Web App Manifest ValidatorValidate a PWA manifest and explain installability-relevant names, icons, URLs, display modes, and shortcuts.Open tool 287Webhook Signature Builder & VerifierBuild or verify HMAC webhook signatures over exact local payload text using SHA-256, SHA-384, or SHA-512.Open tool 288Website URL QR GeneratorValidate and encode an absolute HTTP or HTTPS address as a scalable QR code.Open tool 289WhatsApp Message QR GeneratorCreate a wa.me QR action with an international number and optional message.Open tool 290Wi-Fi QR Code GeneratorCreate a scanner-ready Wi-Fi QR code for WPA, WEP, open, or hidden networks with a masked password.Open tool 291Word Frequency & Readability AnalyzerCount Unicode words and report common terms, sentence density, and an estimated reading score.Open tool 292Workbook & Sheet ExporterSelect XLSX sheets and export each through a collision-safe ZIP package.Open tool 293XML Formatter & ValidatorValidate XML syntax and format its element structure without fetching external entities.Open tool 294YAML Formatter & ValidatorParse YAML safely and emit a clean, consistently indented document.Open tool 295Zstandard Compression WorkbenchCompress and decompress Zstandard payloads locally with bounded expansion checks.Open tool